Mark Rutland e5ae9b5a65 ftrace: Export ftrace_free_filter() to modules ... commit 8be9fbd534 upstream. Setting filters on an ftrace ops results in some memory being allocated for the filter hashes, which must be freed before the ops can be freed. This can be done by removing every individual element of the hash by calling ftrace_set_filter_ip() or ftrace_set_filter_ips() with `remove` set, but this is somewhat error prone as it's easy to forget to remove an element. Make it easier to clean this up by exporting ftrace_free_filter(), which can be used to clean up all of the filter hashes after an ftrace_ops has been unregistered. Using this, fix the ftrace-direct* samples to free hashes prior to being unloaded. All other code either removes individual filters explicitly or is built-in and already calls ftrace_free_filter(). Link: https://lkml.kernel.org/r/20230103124912.2948963-3-mark.rutland@arm.com Cc: stable@vger.kernel.org Cc: Florent Revest <revest@chromium.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Fixes: e1067a07cf ("ftrace/samples: Add module to test multi direct modify interface") Fixes: 5fae941b9a ("ftrace/samples: Add multi direct interface test module") Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-02-01 08:34:37 +01:00
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acrn	…
auxdisplay	…
binderfs	…
bpf	samples/bpf: Fix MAC address swapping in xdp2_kern	2022-12-31 13:32:03 +01:00
configfs	…
connector	…
coresight	…
fanotify	…
fprobe	…
ftrace	ftrace: Export ftrace_free_filter() to modules	2023-02-01 08:34:37 +01:00
hidraw	…
hw_breakpoint	…
kdb	…
kfifo	…
kmemleak	…
kobject	…
kprobes	…
landlock	samples/landlock: Print hints about ABI versions	2022-09-29 18:43:01 +02:00
livepatch	…
mei	…
nitro_enclaves	…
pidfd	…
pktgen	…
qmi	soc: qcom: qmi: use const for struct qmi_elem_info	2022-08-29 17:33:01 -05:00
rpmsg	…
rust	samples: add first Rust examples	2022-09-28 09:03:08 +02:00
seccomp	…
timers	…
trace_events	tracing: Add example and documentation for new __vstring() macro	2022-07-24 19:11:17 -04:00
trace_printk	…
uhid	…
user_events	tracing/user_events: Use bits vs bytes for enabled status page data	2022-09-29 10:17:37 -04:00
v4l	…
vfio-mdev	samples: vfio-mdev: Fix missing pci_disable_device() in mdpy_fb_probe()	2022-12-31 13:32:42 +01:00
vfs	…
watch_queue	…
watchdog	…
Kconfig	samples: add first Rust examples	2022-09-28 09:03:08 +02:00
Makefile	samples: add first Rust examples	2022-09-28 09:03:08 +02:00